Exogenous trehalose differently improves photosynthetic carbon assimilation capacities in maize and wheat under heat stress

High temperature inhibits the growth and development of maize (Zea mays L.) and wheat (Triticum aestivum L.) seedlings. The current study attempts to elucidate the underlying mechanisms of exogenous trehalose for the improvement of maize and wheat responses to heat stress. Results show that, in maiz...

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Bibliographic Details
Published in:Journal of plant interactions 2022-12, Vol.17 (1), p.361-370
Main Authors: Zhang, Ziwei, Sun, Mei, Gao, Yamin, Luo, Yin
Format: Article
Language:English
Subjects:
Assimilation
Biological assimilation
Carbohydrates
Carbon
Corn
Dehydrogenases
Drought
Efficiency
Enzymatic activity
Enzymes
Heat resistance
Heat stress
Heat tolerance
High temperature
Humidity
Life sciences
maize
Malate dehydrogenase
Malic enzyme
NADP
Oxygenase
Photosynthesis
photosynthetic carbon assimilation
Pyruvate carboxylase
Pyruvate phosphate dikinase
Pyruvic acid
Ribulose-1,5-bisphosphate
Seedlings
Seeds
Temperature effects
Trehalose
Triticum aestivum
Wheat
Zea mays
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Summary:High temperature inhibits the growth and development of maize (Zea mays L.) and wheat (Triticum aestivum L.) seedlings. The current study attempts to elucidate the underlying mechanisms of exogenous trehalose for the improvement of maize and wheat responses to heat stress. Results show that, in maize seedlings, exogenously-supplied trehalose was able to effectively elevate the capacity of photosynthetic carbon assimilation and improve the carbohydrate content via up-regulating the transcript levels of key enzymes including phosphoenol pyruvate carboxylase (PEPC), NADP-malate dehydrogenase (NADP-MDH), NADP-malic enzyme (NADP-ME), pyruvate phosphate dikinase (PPDK) and Ribulose-1,5-bisphosphate carboxylase/oxygenase small subunit. Besides, it was also able to improve C 4 pathway enzyme activities, including PEPC, NADP-MDH, NADP-ME and Ribulose-1,5-bisphosphate carboxylase (RUBPCase). In wheat seedlings, exogenously-supplied trehalose promoted photosynthetic carbon assimilation by elevating the activity of RUBPCase. These results show that exogenous trehalose improved photosynthetic carbon assimilation capacities in maize and wheat seedlings under heat stress through different mechanisms.
ISSN:1742-9145
1742-9153
DOI:10.1080/17429145.2022.2041119